Improved atmospheric takbting-apparatus



@Edited tant;

p aient A @More Laim Parent No. 92,615, dated july 13,1869.

IMPROVED ATMOSPHERIC TANmNG-APPARATUS.

The sehadulereferred, to in these Lettera Patent and making paxt of thename.

To all whom it ma/y concern Be it known-that I, JOHN E. KAUFFELT, ofShrewsbury, in the county of York, and State of Pennsylvania, haveinvented a new and improved Atmospheric Tanning-Apparatus; and I dohereby declare that the following is a full, clear, and exactdescriptionof the construction and operation of the same, referencebeing had to the accompanying drawings, making a part oi' thisspecification, in which- Figure l is a transverse Vertical section, and

Figure 2 is a plan view.

This invention consists in applying atmospheric air to the processes ofliming, hating, and tanning hides, for the purpose of producing amechanical action upon the compound in lthe leaches and vats.

In the drawings- A is a leach, and

B a vat, of the kind ordinarily used in tanning-the leach heilig theplace Where the" ground bark is miugled with water for the purpose ofextracting its tan-v nin, and the vat being'the place to which thetannin water is removed from the leach and used for soakinghides.

It has long been well known that agitation and heating of the materialin the vats and leeches, expedites the several operations, and variousmethods have been resorted to to compass these ends, all of themdiffering from. mine.

To carry out my process, I make use of a fan-blower, G, driven by anysuitable power from which the air is forced into a `steam-tight case, D,within which is placed a coil of pipe, d, occupying nearly the wholelength of the case. The exhaust steam of the engine used in theoperation of the tannery, is discharged into the case D, and this heatsthe air from the blower as it traverses the pipes. The latterbcingarranged in a coil, present the greatest possible amount ofheating-surface.

The case is furnished with cocks to regulate the escape of steam and todischarge the water of condensation.

The heated air issues from the oase D, through the pipe e, which isdivided into two branches e e, one leading to the leach and the other tothe vat, each brauch having a stop-cock, so as to shut oi the air or letit ou vat pleasure. 'The branchfpipes ee",.wbich.

enter the vats and leaches, should be madeof copper, so as to'lresistthe action oftannic acid.

These pipes open into the bottoms of the vats and leach'es, and anet-work of boards may be placed with. good effect across the leaches,just above the mouths ofthe pipe, so as to distribute the air throughoutthe bark and water.

As but a very gentle degree of heat is needed for our purpose, in summerthe natural temperature of the air is generally found sufficient,rendering it unnecessary to heat it. Therefore, when I do not de sire towarm the air from t-he blower, I pass it around the case D, instead oi'through it, by means of a pipe,

h, connected at its ends with the extremities of the,

pipe d, which extend beyond the ends of the case,and are furnished withstop-cocks,- situated between the ends of the pipe h and the case D, iuorder to prevent the air from entering the latter.

Having thus described my invention-'- llVhat I claim as new, aud desireto secure by Letters Patent, is-

rlhe described combination and arrangement of an apparatus, G, forforcing atmospheric air; the coiled, convoluted or folded pipe d, thecylinder D, enclosing the pipe d, and connected with the exhaust-pipe ofa Steam-boiler; the pipes e, e', e, and the vats and leaches A, B,substantially as and for the purposes set forth.

' 'lo the above specification of my ivention, I have signed my hand,this 18th day of May, 1869;

JOHN E. KAUFFEL'I.

Witnesses CEAS. A. Pn'rmrr, SoLoN G. KnMoN.

